Remove present?

Author: nzwsch

lib/kredis/types/list.rb

@@ -20,15 +20,15 @@ def prepend(*elements)
     return if elements.flatten.empty?
 
     lpush types_to_strings(elements, typed)
-    expire_in expires_in if expires_in.present?
+    expire_in expires_in if expires_in
     elements
   end
 
   def append(*elements)
     return if elements.flatten.empty?
 
     rpush types_to_strings(elements, typed)
-    expire_in expires_in if expires_in.present?
+    expire_in expires_in if expires_in
     elements
   end
   alias << append